Category: Admin’s blog
Communiations from the Admin
High voltage generation from 3.3-5V
This post describes my standard DC-DC HV converter You know, to power up geiger tubes or photomultipliers there the need of high voltage at very…
PRC320 power supply repair
My military HF manpack radio PRC320, 3 months after I’ve bought it, started to make a whistle and was not able to tune on any…
Software
This is the latest Free Version of Ham Radio Deluxe 5.0.2893 compiled by Simon Brown. Download here HRD_5.0.2893 Borland Turbo C 2.01 original (3 floppy)…
Autunite specimen from China
Recently I’ve bought a little specimen of Autunite from China. My sample is 20mm in lenght, 15mm width and 6mm thick with nice green lamellar…
NER10 X-Ray generator
I’ve bough from eBay a NER10 X-Ray generator tube. It was build in 1925-1930 I don’t know exactly when. It’s interesting to see how well…
PRT-E750W & PRT-E1500W vfd settings
How to set correctly the PRT-E750W and PRT-E1500W (are equals except for the power capability) VFD supplied with CNC 3020 and CNC 6040 chinese routers….
Radioactive sources
This is my actual collection of radioactive sources. Thorium Kodak lens Kodak had made some 35mm analog film models of cameras (1950-1970) like Retina IIIc,…
Schematics/Gerber
MadEXP PMT Adapter v2.0 schematic/gerber files plus license. Click on the link to download. MadExp PMT MadEXP PMT Adapter v2.5 schematic/gerber files plus license. Click…
Z80 Single Board Computer
This is my first didactic 8bit – Z80 based computer. I’ve made it because I was interested into homebrew a working computer from TTL chips…
MS-4 γ-selective Geiger counter
This is a γ-selective Geiger counter from the “M” professional serie used also in demonstration devices for measuring the age of minerals by the activity…
